Change price on punchout/catalog item in the iProcurement shopping cart

We have a requirement from one of our end users that they need to be able to change the price on the catalog item after they have punched out back into the shopping cart. Unfortunately the iProcurement application doesn't allow them to change the price (OAF personalization doesn't work). We logged an SR to confirm the behavior and Oracle confirmed that this is an enhancement request. They couldn't provide a workaround either. I am sure this must be a fairly common requirement. What are other customers of iProcurement punchouts doing? Any thoughts /inputs?